7018 CE/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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7018 CE/P4ADBB Bearing Product Overview & Core Advantages
The 7018 CE/P4ADBB is a precision angular contact ball bearing configured as a duplex back-to-back (DB) matched set. This arrangement is engineered to provide exceptional rigidity and stability, making it ideal for applications requiring high rotational accuracy under combined loads (radial and axial). Manufactured to the stringent P4A tolerance class, it delivers superior running accuracy and is preloaded (Light / Class B) for optimal performance in demanding, high-speed machinery.
7018 CE/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7018 | Basic bearing series, with a 90 mm bore and 140 mm outside diameter. |
| C | Designates a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| E | Indicates optimized internal design for enhanced performance and load rating. |
| P4A | Specifies the high-precision tolerance class, exceeding ABEC 7/ISO P4 standards for superior running accuracy. |
| DB | Denotes the bearing is supplied as a Duplex Back-to-Back matched pair, providing high moment stiffness. |
| B | Indicates the specific light preload (Class B) applied to the matched set. |
7018 CE/P4ADBB Bearing Structural Features & Performance Benefits
High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to handle significant combined radial and axial loads simultaneously.
High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the precision-ground chrome steel components and optimized internal design contribute to a high limiting speed of 15,000 rpm.
Precision & Longevity: Manufactured to P4A tolerance class from high-grade chrome steel, this bearing ensures minimal vibration, low noise, and extended service life in precision applications.
7018 CE/P4ADBB Bearing Typical Application Areas
This high-precision, high-rigidity bearing set is ideally suited for:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Frequency Motors and Spindles
- Precision Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Robotics and Automation Equipment
